Ive got a function of f(x)=x^3+x and I need to use factors to show that the graph crosses the x axis once only.(adsbygoogle = window.adsbygoogle || []).push({});

I just factorised it to x(x^2+1) which isn't very helpful, and if i divide everything by x and complete the square with x^2+1 i get a negative number and stuff....

any help?

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# X intercepts

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